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Sound Insulation Performance Of Kenaf Fibre As A Noise Control Treatment In Car Using Statistical Energy Analysis

In recent years, kenaf fibre has been highlighted for its superiority as the filler for composite materials. However, study of the fibres as an acoustic absorber is still lacking. In this paper, the sound absorption of kenaf fibre specimens are studied both under normal and random sound incidence. T...

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Main Authors: Azahari, Norzailan, Putra, Azma, Mat Dan, Reduan, Othman, Muhammad Nur
Format: Article
Language:English
Published: Science & Technology Research Institute for Defence (STRIDE) 2019
Online Access:http://eprints.utem.edu.my/id/eprint/24185/2/AZMA%20PUTRA.PDF
http://eprints.utem.edu.my/id/eprint/24185/
http://www.stride.gov.my/v2/images/penerbitan/buletin-teknikal/2019_vol_12_num_1.pdf
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spelling my.utem.eprints.241852020-08-07T09:21:32Z http://eprints.utem.edu.my/id/eprint/24185/ Sound Insulation Performance Of Kenaf Fibre As A Noise Control Treatment In Car Using Statistical Energy Analysis Azahari, Norzailan Putra, Azma Mat Dan, Reduan Othman, Muhammad Nur In recent years, kenaf fibre has been highlighted for its superiority as the filler for composite materials. However, study of the fibres as an acoustic absorber is still lacking. In this paper, the sound absorption of kenaf fibre specimens are studied both under normal and random sound incidence. The normal-incidence sound absorption coefficient measurement was conducted using the impedance tube method. The effects of thickness involving full fibre and air-fibre specimen and the effect of bulk density were discussed. For the random-incidence sound absorption coefficient, the test was conducted in a reverberation chamber. From both methods, the results in general reveal that for bulk density of 140–150 kg/m3 and thickness of 25–30 mm, the absorption coefficient is above 0.5 starting from 500 Hz and can reach 0.85 on average above 1.5 kHz. These frequency bandwidth of absorption and the level of absorption coefficient improve significantly when bulk density and thickness are increased. Additional air gap also improve the absorption toward lower frequency. Science & Technology Research Institute for Defence (STRIDE) 2019 Article PeerReviewed text en http://eprints.utem.edu.my/id/eprint/24185/2/AZMA%20PUTRA.PDF Azahari, Norzailan and Putra, Azma and Mat Dan, Reduan and Othman, Muhammad Nur (2019) Sound Insulation Performance Of Kenaf Fibre As A Noise Control Treatment In Car Using Statistical Energy Analysis. Defence S And T Technical Bulletin, 12 (1). 126 - 139. ISSN 1985-6571 http://www.stride.gov.my/v2/images/penerbitan/buletin-teknikal/2019_vol_12_num_1.pdf
institution Universiti Teknikal Malaysia Melaka
building UTEM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknikal Malaysia Melaka
content_source UTEM Institutional Repository
url_provider http://eprints.utem.edu.my/
language English
description In recent years, kenaf fibre has been highlighted for its superiority as the filler for composite materials. However, study of the fibres as an acoustic absorber is still lacking. In this paper, the sound absorption of kenaf fibre specimens are studied both under normal and random sound incidence. The normal-incidence sound absorption coefficient measurement was conducted using the impedance tube method. The effects of thickness involving full fibre and air-fibre specimen and the effect of bulk density were discussed. For the random-incidence sound absorption coefficient, the test was conducted in a reverberation chamber. From both methods, the results in general reveal that for bulk density of 140–150 kg/m3 and thickness of 25–30 mm, the absorption coefficient is above 0.5 starting from 500 Hz and can reach 0.85 on average above 1.5 kHz. These frequency bandwidth of absorption and the level of absorption coefficient improve significantly when bulk density and thickness are increased. Additional air gap also improve the absorption toward lower frequency.
format Article
author Azahari, Norzailan
Putra, Azma
Mat Dan, Reduan
Othman, Muhammad Nur
spellingShingle Azahari, Norzailan
Putra, Azma
Mat Dan, Reduan
Othman, Muhammad Nur
Sound Insulation Performance Of Kenaf Fibre As A Noise Control Treatment In Car Using Statistical Energy Analysis
author_facet Azahari, Norzailan
Putra, Azma
Mat Dan, Reduan
Othman, Muhammad Nur
author_sort Azahari, Norzailan
title Sound Insulation Performance Of Kenaf Fibre As A Noise Control Treatment In Car Using Statistical Energy Analysis
title_short Sound Insulation Performance Of Kenaf Fibre As A Noise Control Treatment In Car Using Statistical Energy Analysis
title_full Sound Insulation Performance Of Kenaf Fibre As A Noise Control Treatment In Car Using Statistical Energy Analysis
title_fullStr Sound Insulation Performance Of Kenaf Fibre As A Noise Control Treatment In Car Using Statistical Energy Analysis
title_full_unstemmed Sound Insulation Performance Of Kenaf Fibre As A Noise Control Treatment In Car Using Statistical Energy Analysis
title_sort sound insulation performance of kenaf fibre as a noise control treatment in car using statistical energy analysis
publisher Science & Technology Research Institute for Defence (STRIDE)
publishDate 2019
url http://eprints.utem.edu.my/id/eprint/24185/2/AZMA%20PUTRA.PDF
http://eprints.utem.edu.my/id/eprint/24185/
http://www.stride.gov.my/v2/images/penerbitan/buletin-teknikal/2019_vol_12_num_1.pdf
_version_ 1677784671353569280
score 13.211869

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